package com.zshan.clinic.common.util.ip;


import com.zshan.clinic.common.util.string.StringUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

import javax.servlet.http.HttpServletRequest;


@Slf4j
public class IpUtil {

    /**
     * 获取Ip地址
     *
     * @param request
     * @return
     */
    public static String getIpAdrress(HttpServletRequest request) {

        try {
            String Xip = request.getHeader("X-Real-IP");
            String XFor = request.getHeader("X-Forwarded-For");
            if (StringUtils.isNotEmpty(XFor) && !"unKnown".equalsIgnoreCase(XFor)) {
                //多次反向代理后会有多个ip值，第一个ip才是真实ip
                int index = XFor.indexOf(",");
                if (index != -1) {
                    return XFor.substring(0, index);
                } else {
                    return XFor;
                }
            }
            XFor = Xip;
            if (StringUtils.isNotEmpty(XFor) && !"unKnown".equalsIgnoreCase(XFor)) {
                return XFor;
            }
            if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
                XFor = request.getHeader("Proxy-Client-IP");
            }
            if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
                XFor = request.getHeader("WL-Proxy-Client-IP");
            }
            if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
                XFor = request.getHeader("HTTP_CLIENT_IP");
            }
            if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
                XFor = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
                XFor = request.getRemoteAddr();
            }
            return StringUtil.isBlank(XFor) ? "127.0.0.1" : XFor;
        } catch (Exception e) {
            log.error("获取请求IP发生异常", e);
            return "127.0.0.1";
        }
    }
}
